Table 5. The F1-score of the proposed model with different structures.

Name of the project	DNN-8	DNN-9	DNN-10	DNN-11	DNN-11	DNN-12	DNN-13	DNN-14	DNN-15	DNN-16	DNN-17
ceylon-ide-eclipse	71.19	81.37	77.09	53.04	77.50	78.60	80.62	56.23	60.82	80.29	78.12
BroadleafCommerce	84.59	82.48	87.05	86.41	83.38	83.24	85.20	81.91	88.45	82.96	85.04
hazelcast	60.68	68.79	64.56	55.41	62.83	66.28	58.11	64.12	65.48	55.91	62.96
elasticsearch	75.55	72.09	73.46	65.36	63.59	71.89	75.70	38.90	76.30	77.36	77.57
MapDB	76.36	76.00	76.20	15.88	78.33	77.42	68.51	76.12	73.69	76.55	81.25
netty	78.10	75.59	77.30	65.29	72.81	82.94	77.52	77.77	73.65	74.91	78.47
orientdb	75.92	75.22	73.31	61.49	73.80	78.74	69.30	78.48	68.33	75.06	67.33
neo4j	76.64	75.20	76.15	66.74	75.40	68.71	72.07	48.20	73.85	78.20	72.44
titan	80.99	76.81	84.80	84.55	79.52	78.03	79.49	81.87	53.43	81.55	81.97
mcMMO	59.58	65.07	58.44	48.54	60.29	67.68	69.39	72.94	78.84	67.04	71.83
Android-Universal-Image-Loader	75.47	61.35	69.60	53.31	69.87	71.01	71.43	43.60	55.59	73.07	70.45
antlr4	81.87	85.64	85.16	62.56	81.87	82.33	82.98	87.98	43.13	82.10	79.77
junit	81.61	83.90	81.42	47.27	75.38	82.51	80.24	76.67	58.54	82.14	82.68
mct	84.21	88.89	89.52	88.89	85.56	74.11	89.52	77.78	66.67	96.67	96.67
oryx	92.79	88.73	93.51	80.62	91.78	95.36	94.93	92.72	81.60	93.20	92.05
Average	77.03	77.14	77.83	62.35	75.46	77.25	77.00	70.35	67.89	78.46	78.57